Calendar.



column will be 2, which indicates the day i of the week upon which thefirst day of January 1917 falls. In a like manner the January column iscontinued as far as is desired. In this same manner the Februaryl monthcolumn is built up. The lMarch month column for 1915 contains thennmeral 2, indicating that the first day of March 1915 fell-on thesecond day of the week. Since 1916 is a leap year, one numeral in theregular consecutive order of numerals is dropped between 1915 and 1916,which makes the next numeral in said March month column numeral mi.According to the above rule the next numeral in the March month columnwill be numeral 1, and so on until the column has been continued as faras desired. In the same manner the remaining nine month columns arebuilt up.

If it is desired to ascertain a diierent day of the month than the lirstday, this is done by first determining' the first day oi the month inwhich the desired date falls. Then upon consulting the correspondingmonth calendar, the day of the week of the desired date will be found.As an instance of this, suppose it is desired to lmow the day of theweek upon which the Fourth of July will be in 1920. ,The index isconsulted in the 1920 year line, and in the Jul column we find thenumeral 5, which indicates that the first day of July 1920-.will be onThursday, the fifth day of the week. Then upon consultin month calendar5 we find the Fourt of July will be on Sunday. In this same manner theday of the week of any other desired date may be ascertained.

VThe index shown in the drawin extends from years 1880 to 1930inclusive, but it willbe apparent from the above that this index may beextended in either direction as far as desired, or the index may beshortened to indicate only one or more years, as may be desired.

While I have illustrated `and described the preferred form of myinvention, I do not desire toI be limited to the precise details setforth, l.1-1t'desire to avail myself of such variations and changes'ascome within the scope of the appended claims.

1. A calendar comprising thirteen par allel columns, one of the columnsbeing a column of year y dates arranged consecutively with the leapyears displayed 1n a distinctive manner and the other twelve col umnsbeing month columns designated January toDecemher month columnsrespectively and each bein made up of seven recurringfsymbols which havea consecutive relation with each other and relate to the days' of theweek, said symbols being arranged in consecutive order in each monthcolumnexcept in the January and February month columns Where one symbolis dropped from the consecutive order between each leap year and theyear following such leap year and in each of the other ten month columnsone symbol is dropped from the regular consecutive order between eachleap year and the year previous to such leap year.

2. A calendar comprising seven month calendars each beginning on adifferent day of the week and having a designating symbol, saiddesignating symbols having a consecutive orderly relation correspondingto the days of the week upon which the first days of the month calendarsbegin; and an index having a column of consecutive year dates with theleap years displayedin a distinctive manner and twelve month columnsparallel with the year dates column and designated as January toDecember month columns respectively, each of the month columns beingmade up Vof symbols corresponding to the designating symbols of themonth calendars and arranged in a consecutive order except in theJanuary and February month columns where one symbol is dropped from theconsecutive order between each leap year and the fyear following suchleap year and in eacho the other ten month columns one symbolV isdropped from the regular consecutive order between each leap year andthe year preceding such leap year.

VIn testimony whereof I have signed m name to this specification, in thepresence ci two subscribing witnesses, on this 2nd day of October, A. D.1915.

\ u EPHRAIM H. RODEN. Vlviizriesses: ARrHUB L. SPRINKLE,

THdMAs CoLsoN.

Copiez' of this patent may he obtained for ive cents each, by`mlntlreszzing'tlle Commissioner o! Patents,

v i Wilmington, 3.0.

